By CAROLINE PROSSER and LOUISE SAUNDERS

She never ceases to amaze with her zany choices of outfit.

And Lady Gaga took the festive season as her inspiration as she left the Jingle Bell Ball at London’s O2 arena wearing a real Christmas tree.

The Born This Way singer made her way to the Langham Hotel in London with a pine tree decorated with baubles and a star as a hat.

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Wearing real fir: Lady Gaga returns to her hotel after the Jingle Bell Ball at London’s O2 bizarrely dressed as a Christmas Tree

Festive spirit: Lady Gaga is seen arriving back at her London hotel dressed as a Christmas tree

Strangely pretty: Even though Gaga was playfully dressed as a tree, her make-up was done delicately to make her still appear glamorous

She wore a bright green wig while her red playsuit resembled the pot of the Christmas tree.

Earlier in the evening the star had headlined the second night of the festive event.

However, when she took the stage, her attire was strikingly different. Entering in a sports car, the flamboyant artist wore a diamond-studded suit accentuated with a stylish curved belt around her waist.

There, Lady Gaga sang her hit song Poker Face and asked the audience ‘does anyone know what this song is really about?’ 

Anything for her little monsters: Gaga happily posed with onlookers whilst staying in character

Balancing act: The pop star did a great job at holding her head up as she teetered along in sky-high platform boots on the brick pathway

Colourful: Gaga decorated her Christmas tree hat with an assortment of baubles

Impractical: Gaga adjusts one of the branches of her hat as she is greeted by fans

Helpful: The singer delicately holds up a trainer which had been lost by an over-eager photographer

Peace! Gaga showed off her wrist tattoo that went well with the giving holiday spirit

Christmas side-boob: Lady Gaga returns back to her hotel where she flashed some serious boob

Attention to detail: Lady Gaga had chosen a playsuit which resembled the pot of the tree

She cryptically answered: ‘When you’re lying in bed and you have a Christmas secret.’

The singer expressed her joy at performing in an arena once again, sharing, ‘This is a thrilling day for me. I haven’t performed in an arena since February because my grandma had a hip issue. So, thank you for being here to welcome me back.’

She then stripped down to a bra and knicker combo, which she wore with fishnet stockings.

Driving force: Lady Gaga performing on stage during the 2013 Capital FM Jingle Bell Ball at the O2 Arena, London

Green with envy? Lady Gaga give sit her all on stage with a troupe of dancers

Shelling out: Gaga shows off a shell-effect bra top with fishnet stockings

Dreaming of a green Christmas: Gaga opted for a very festive look a she sang for thousands of fans

As she delivered her powerful performances, she told the crowd, ‘I have a very rebellious nature, but whenever I get into trouble, I tell them I was born this way.’

Chatting away to the child-heavy crowd, she said: ‘I learned something really special during all my time off. While I was gone, I learned I might have had my picture taken every day and people calling my name but I felt unfulfilled.

‘I never wanted to be famous for no reason. I live for this moment when the spotlight hits my face. I get to watch you laugh at me and say I can’t believe she said that. I want you to know that. I want you to know, I don’t live for fame I live for this moment right now, the applause.’

Nothing to be gilt-y of: Gaga wore a heavy gold necklace with her starfish print suit

Another look: Lady Gaga is inspired by the sea as she poses backstage at the Jingle Bell Ball in London

Throw up the peace sign: Gaga has certainly torn up the rule book when it comes to what to wear

Earlier in the day, the chameleon-like singer had stepped out in another look, wearing a wig of blonde dreadlocks and a starfish-print trouser suit with her black bra on show.

She kept the same blonde dreadlocks and red nails as she left her hotel on Monday morning as she prepared to head back to America, but the rest of her look was a whole new style.

It’s unlikely her get-up would be a comfortable thing to wear during a long flight but that’s never stopped the eccentric dresser before.

Not so mellow yellow: Lady Gaga was seen leaving her hotel to go back to America on Monday

That’s shoe-business: The superstar wore vertiginous heels which must have been hard to walk in

Gaga wore an ochre yellow pencil Zeynep Tosun AW13 collection dress which had a fishtail detail at the hem which meant that it flared out in a frilly fashion.

The sleeves were made of a fluffy type of fabric and she wore a Tudor-style ruffled white collar around her neck.

She added a pair of black opaque tights and wore vertiginous black patent lace-up heels which must have been a challenge to walk in.

Hair today! The wacky singer rocked blonde dreadlocks for the outing

She pinned some of her hair up and kept her make-up relatively simple for a change, aside from the red lipstick she was wearing.

Gaga posed for waiting photographers outside her hotel and blew kisses and put her hand on her hip as she sashayed forwards.

She also posed with a ‘V’ sign which she made with her fingers.

For the frill of it: She wowed in a ochre yellow high-necked dress

No doubt Lady Gaga had lots of memories from the night before.

Also performing at the Jingle Bell Ball were Little Mix, who sang an a cappella rendition of How Ya Doin?, kicking off their set with a performance of their hit single Move.

Their amazing vocals were backed with a simple beat, with Jesy Nelson telling the crowd: ‘We’re very excited about tonight, so we thought we’d do a little a cappella number for you.’

They then performed DNA, which was followed by their new single Little Me, which was dedicated to all of their fans, before finishing with Wings.

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Jessie J was joined by Dizzee Rascal when the ‘Bonkers’ rapper joined her on stage to sing Wild.

The UK star kicked off with a performance of her hit song Price Tag, wearing a red sparkly sequined dress with bright red glitter in her cropped black hair.

Then Jessie told the crowd she wanted to get ‘the slow song out of the way first’ by performing hremotional latest single Thunder, which features on her recent album Alive.

Close: Jessie J and Dizzee Rascal wrap their arms around each other as they perform

Jessie then proceeded to sing her number one hit Domino, asking the crowd: ‘Who’s feeling sexy and free? Are you ready to show me that you are?’

The UK singer then sang her first ever single Do It Like A Dude which included a breakdown of Jay-Z’s hit N****s In Paris.

Then Jessie sang her lead Alive single Wild before Dizzee Rascal joined her on stage. 

Her final song of the night was It’s My Party, heading straight out to the front of the stage runway.

Working the crowd: Lawson performing on stage during the 2013 Capital FM Jingle Bell Ball

Rocker: Ryan Fletcher of Lawson performs in a black leather jacket

Lawson sang their recent single Brokenhearted, which was followed by the band’s 2013 single Learn To Love Again.

The boys then began an acoustic version of one of their best-known singles, Standing In The Dark, with Andy asking the crowd to singalong.

Their final song was their latest single Juliet, with the crowd singing along.